Improvement in shutter-bolts



J. MITCHELL.

SHUTTER-BOLT.

Patented N ov.16,1875.

N-PETERS, PHDTO-LIMOGRAP"ER, WASHINGTONv D 0.

UNITED STATES PATENT OFFICE.

JOHN MITCHELL, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN SHUTTER-BOLTS.

Specification forming part of Letters Patent No. 170,104, dated November16, 1875; application filed October 2, 1875.

To all whom it may concern: 7

Be it known that I, JOHN MITcHELL, of Philadelphia, Pennsylvania, haveinvented an Improved Shutter Bolt and Retainer, of which the followingis a specification:

The object of my invention is to construct a simple and efficient devicewhich can be used either for lockin g or unlocking shutters, or forretaining the same in a bowed condition; and this object I attain in themanner which I will now proceed to describe, reference being had to theaccompanying drawing, in which Figure 1 is a perspective view,illustrating my improvement; Fig. 2, an enlarged section of a portion ofthe same; and Fig. 3, a plan view, showing the manner of using the boltas a shutter-retainer. Y

A and B are two flat plates, secured one to one shutter, X, and theother to the other shutter, X. To the plate A is pivoted a bar, D, bymeans of the pin a, and the plate B is provided with two hookedprojections, E E, within which the bar can rest, as shown in Fig. 1. Theouter end of the said bar D is provided with an eye, I), and its innerend is adapted to a.hooked projection, d, near the outer end of theplate A, this projection receiving and retaining the inner end of thebar when the shutters are looked. The bar D is retained in thehorizontal position, (shown by plain lines,) as well as in its verticalposition, (shown by dotted lines,) by means of a springbolt, f, theenlarged inner end of which fits into one or other of two openings, 9and h, in the plate A, according to the position. of the bar.

When the device is to be used for retaining the shutters in apartially-closed position the eye I) on the end of the bar D is placedover one of the hooked projections E, and the'said bar is then adjustedto a horizontal position, where it is retained by the spring-bolt f, sothat any movement of either of the shutters is effectually prevented.

I claim as my invention- 1. The plate A, having the hooked projection(1, and carrying a pivoted bar, D, provided at its outer end with aneye, b, in combination with the plate B and its two hooked-projections,E E, all substantially as setfortlh.

2. The bar D and its spring-bolt f, in combination with the plate A andits openings g and h, as and for the purpose specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOHN MITCHELL.

Witnesses:

' J OHN M. DEEMER,

HARRY SMITH.

